package com.datastax.oss.driver.internal.core.util;
public class NanoTime {
private static final long ONE_HOUR = 3600L * 1000 * 1000 * 1000;
private static final long ONE_MINUTE = 60L * 1000 * 1000 * 1000;
private static final long ONE_SECOND = 1000 * 1000 * 1000;
private static final long ONE_MILLISECOND = 1000 * 1000;
private static final long ONE_MICROSECOND = 1000;
public static String formatTimeSince(long startTimeNs) {
return format(System.nanoTime() - startTimeNs);
}
public static String format(long elapsedNs) {
if (elapsedNs >= ONE_HOUR) {
long hours = elapsedNs / ONE_HOUR;
long minutes = (elapsedNs % ONE_HOUR) / ONE_MINUTE;
return hours + " h " + minutes + " mn";
} else if (elapsedNs >= ONE_MINUTE) {
long minutes = elapsedNs / ONE_MINUTE;
long seconds = (elapsedNs % ONE_MINUTE) / ONE_SECOND;
return minutes + " mn " + seconds + " s";
} else if (elapsedNs >= ONE_SECOND) {
long seconds = elapsedNs / ONE_SECOND;
long milliseconds = (elapsedNs % ONE_SECOND) / ONE_MILLISECOND;
return seconds + "." + milliseconds + " s";
} else if (elapsedNs >= ONE_MILLISECOND) {
return (elapsedNs / ONE_MILLISECOND) + " ms";
} else if (elapsedNs >= ONE_MICROSECOND) {
return (elapsedNs / ONE_MICROSECOND) + " us";
} else {
return elapsedNs + " ns";
}
}
}